This Wave coffee brewer from Kalita is a flat three-holed bottom brewer, unlike the cone versions available with things like the V60 or Chemex, which means the coffee is in contact with the water in a different way.
It also uses filters with a 'wave' technology, which also change the way the brew extracts.
300ml - 500ml of final brew
Please note: instructions are in Japanese. Brew ratios to start weights are similar to that of the Hario V60 and Chemex of 60g of coffee for every 1 litre of water.
Filters and Server sold separately.